Fire Power By Taylor/Sumax for 1965-1999 Softails, Dyna, FX, FL - One Size Pack some heat with black 9mm wires with silver metallic 9mm gun boots All wires fire intermittently no matter what coil or ignition you may have. That is why you see carbon on your plugs 9mm wires provide a solid stream of fire power resulting in more horsepower, more torque and better mileage Your bike will start and run better than ever before Includes a set of 2 wires